Find the exact values of cos 3 pi/4 radians sin 3 pi/4 radians.

If you consult the unit circle, you will see that:



3pi/4 in degrees is 3pi/4 * 180/pi = 3/4 * 180 = 135 degrees. And please refer to the attachment to how you can obtain the values above.

Now, lets multiply it together.



So, cos(3pi/4)sin(3pi/4) = -1/2

3units/ 5 feet = 60 units/ 100 feet3 units/ 5 feet = 18 units/ 30 feetthe dimensions of the scale drawing are 60 units by 18 units.hope this !